American researchers paid university students five dollars per night to sleep longer, boosting both their nightly rest and overall academic grades.
Physician Vincent Valinducq detailed the findings of the month-long experiment during a segment on Bonjour ! La Matinale TF1, the flagship morning news program on France's leading television network TF1. He explained that before the financial incentive was introduced, participating students slept an average of just six hours and 39 minutes each night.
To carry out the investigation, the American research team initially screened more than 1,000 university students before selecting a final cohort of 468 participants. Scientists had previously tested various educational and behavioral approaches to encourage healthier habits among young adults, but financial rewards ultimately proved to be the most effective factor in motivating students to go to sleep earlier.
Valinducq noted that some participants were equipped with digital wristbands to track their nighttime sleep duration continuously. In addition, students received evening phone alarms reminding them when it was time to turn off lights and go to bed, followed by morning notifications that provided a detailed summary report of their night of sleep. Participants received five dollars, equivalent to roughly four euros, for every night they managed to sleep for at least seven hours.
Financial incentives for student sleep
The cash compensation produced immediate and measurable changes in student sleeping habits over the course of the four-week study. Valinducq stated that the proportion of nights where students slept for seven hours or more increased by 26 percent during the reward phase.
Students who received the financial incentive slept an average of 19 minutes longer per night while the payments were active. Even after the trial concluded and the financial rewards ended, participants retained an additional eight minutes of sleep per night compared to their initial baseline, having successfully modified their evening routines and daily habits.
The extra rest had a direct positive effect on academic performance across the participant group. Valinducq highlighted that sleeping more led to an improvement in the students' overall grade point average, which rose by 0.075 points. Although the numerical increase appears small, researchers pointed out that students achieved these higher marks without spending extra time studying, simply by getting better sleep and reorganizing their schedules.
Broader health and university measures
Sleep deprivation is a widespread challenge facing university students worldwide, as academic pressure and screen time often interfere with rest. Medical guidelines generally recommend that young adults obtain between seven and nine hours of sleep per night to maintain optimal cognitive performance, memory retention, and physical health.
Following the trial, the researchers considered how universities could help students maintain these sleep and academic gains without relying on perpetual cash payments. They suggested that higher education institutions could adjust morning lecture timetables to better accommodate natural youth sleep patterns, as well as set up dedicated rest rooms and relaxation spaces on campus.
Sleep issues are similarly widespread among European students. Valinducq cited a report by the National Student Life Observatory in France, known as the Observatoire de la vie étudiante, which found that one in three French university students reports experiencing academic difficulties caused by inadequate or poor quality sleep.
